Kelp forests, often called the “tropical forests of the sea”, play a vital role in supporting marine life, protecting coastlines and absorbing carbon dioxide. However, in recent decades, these underwater forests have been devastated by marine heatwaves caused by climate change.
New research published by the British Ecological Society in the Journal of Applied Ecology highlights that marine protected areas (MPAs) can be a powerful tool to accelerate the recovery of kelp forests after extreme warming.
🔎 Where are these forests located?
Kelp forests grow along the coast in temperate regions, including:
Pacific coast of California, USA
Coasts of Chile and Peru
Great Southern Reef of Australia
North Atlantic (Norway, UK, France, Spain)
Cool coastal areas of South Africa
📌 Research results
The study was led by Dr Thomas Wernberg (University of Western Australia), Dr Daniel Smale (Marine Biological Association, UK) and their international colleagues. They examined long-term data on kelp ecosystems and found that:
Kelp forests within MPAs recovered 40% faster than those in unprotected waters.
The presence of healthy populations of predators (such as sea otters and lobsters) reduced the spread of sea urchins, which often overgraze on the kelp.
Marine Protected Areas (MPAs) have created climate reserves where kelp has been able to naturally recover from extreme heat.
🌍 Global success stories
Monterey Bay National Marine Sanctuary (USA) – After a severe decline in kelp populations, recovery has begun within a decade thanks to protection.
Great Southern Reef (Australia) – Kelp-resistant areas within MPAs help stabilize fisheries.
Norwegian coast – MPAs have improved biodiversity and allowed kelp forests to expand again.
💲 Ecological and economic value
Kelp forests are not only ecologically important, but also economically valuable. According to recent estimates:
The global kelp industry (food, cosmetics, biofuels, pharmaceuticals) is valued at over $13 billion annually.
Coastal protection services from kelp forests save governments billions of dollars in storm damage costs.
📜 Key organisations involved
British Ecological Society
University of Western Australia
Marine Biological Association (UK)
NOAA (National Oceanic and Atmospheric Administration, USA)
International Union for Conservation of Nature (IUCN)
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